Composition and functions of AUTOSAR communication protocol stack

The AUTOSAR communication protocol stack consists of multiple modules, including the communication layer (Com), diagnostic communication layer (Dcm), routing layer (PduR), protocol data unit multiplexing layer (IpduM) and bus-related transport layer (Tp). These modules work together to realize the functions of data transmission, reception, routing, multiplexing, etc., ensuring the effective and reliable transmission of data inside the car. For example, the Com module provides a signal-based data service interface, the Dcm module implements diagnostic communication, the IpduM module supports multiple uses of PDU, and the TP module is responsible for the unpacking and assembly of large protocol data units.